Which cranial nerve is responsible for the sense of smell and is the first cranial nerve?

Which cranial nerve is responsible for the sense of smell and is the first cranial nerve?

• A. Optic nerve
• B. Oculomotor nerve
• C. Olfactory nerve
• D. Trochlear nerve

Answer: (C)

Smell is carried by the olfactory nerve, which is the first cranial nerve. It is a purely sensory nerve that starts in the nasal mucosa and travels through the cribriform plate to reach the olfactory bulb, where the signals are then sent to brain regions involved in olfactory processing. This is different from the other nerves listed: the optic nerve handles vision, the oculomotor nerve controls most eye movements and pupil constriction, and the trochlear nerve moves the superior oblique muscle of the eye. So, for the sense of smell and being the first cranial nerve, the olfactory nerve is the correct one.

Smell is carried by the olfactory nerve, which is the first cranial nerve. It is a purely sensory nerve that starts in the nasal mucosa and travels through the cribriform plate to reach the olfactory bulb, where the signals are then sent to brain regions involved in olfactory processing. This is different from the other nerves listed: the optic nerve handles vision, the oculomotor nerve controls most eye movements and pupil constriction, and the trochlear nerve moves the superior oblique muscle of the eye. So, for the sense of smell and being the first cranial nerve, the olfactory nerve is the correct one.